// Created on: 1993-03-17
// Created by: Laurent BUCHARD
// Copyright (c) 1993-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _ApproxInt_SvSurfaces_HeaderFile
#define _ApproxInt_SvSurfaces_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Handle.hxx>

#include <Standard_Boolean.hxx>
#include <Standard_Real.hxx>
class gp_Pnt;
class gp_Vec;
class gp_Vec2d;
class IntSurf_PntOn2S;


class ApproxInt_SvSurfaces 
{
public:

  DEFINE_STANDARD_ALLOC

  
  //! returns True if Tg,Tguv1 Tguv2 can be computed.
  Standard_EXPORT virtual Standard_Boolean Compute (Standard_Real& u1, Standard_Real& v1,
                                                    Standard_Real& u2, Standard_Real& v2,
                                                    gp_Pnt& Pt,
                                                    gp_Vec& Tg,
                                                    gp_Vec2d& Tguv1,
                                                    gp_Vec2d& Tguv2) = 0;
  
  Standard_EXPORT virtual void Pnt (const Standard_Real u1, const Standard_Real v1,
                                    const Standard_Real u2, const Standard_Real v2,
                                    gp_Pnt& P) = 0;

  //! computes point on curve and parameters on the surfaces
  Standard_EXPORT virtual Standard_Boolean SeekPoint(const Standard_Real u1, const Standard_Real v1,
                                                     const Standard_Real u2, const Standard_Real v2,
                                                     IntSurf_PntOn2S& Point) = 0;
  
  Standard_EXPORT virtual Standard_Boolean Tangency (const Standard_Real u1, const Standard_Real v1,
                                                     const Standard_Real u2, const Standard_Real v2,
                                                     gp_Vec& Tg) = 0;
  
  Standard_EXPORT virtual Standard_Boolean TangencyOnSurf1 (const Standard_Real u1,
                                                            const Standard_Real v1,
                                                            const Standard_Real u2,
                                                            const Standard_Real v2,
                                                            gp_Vec2d& Tg) = 0;
  
  Standard_EXPORT virtual Standard_Boolean TangencyOnSurf2 (const Standard_Real u1,
                                                            const Standard_Real v1,
                                                            const Standard_Real u2,
                                                            const Standard_Real v2,
                                                            gp_Vec2d& Tg) = 0;
  Standard_EXPORT virtual ~ApproxInt_SvSurfaces();




protected:





private:





};







#endif // _ApproxInt_SvSurfaces_HeaderFile
